if_bridge and CARP causes hangs

Stefan Bethke stb at lassitu.de
Sun Sep 23 09:13:49 UTC 2018

I’ve just stumbled on this problem, which seems to be quite old and still unresolved.


As a quick summary: if you configure CARP on an if_bridge interface, the CARP state changes will (always/with a high probability) create a deadlock between CARP and the if_bridge code, leading to the machine becoming unresponsive.

There is a suggested patch, but work on it seems to be very slow:

I would love to see a fix in 11-stable or 12.0. Is there something I can do to help move this forward?


Stefan Bethke <stb at lassitu.de>   Fon +49 151 14070811

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